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Explain the nuclear model

The atom consists of three sub-atomic particles: Protons; Neutrons and electrons. Protons and neutrons are in the nucleus of the atom and the electrons occupy the electron shells around the nucleus. Electron...
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Answered by Emily P. • Chemistry tutor
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Describe and explain mitosis

Mitosis is the division (and multiplication) by body cells or somatic cells (cells that arent gametes.) Gametes- sperm and egg; undergo meiosis Somatic cells- body cells; undergo mitosis . Both the daughter ...
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Answered by Emily P. • Biology tutor
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Expand and simplify 3(m + 4) – 2(4m + 1)

Multiply through the 3 of the first bracket to get 3m +12. Then multiply out the second bracket by -2 to get -8m -2. Write it out in a line: 3m + 12 - 8m -2 Simplify: -5m +10 Divide by -5 again to simplify f...
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Answered by Tutor49422 D. • Maths tutor
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A bag contains 5 blue marbles and 5 red marbles. If marbles are NOT replaced after being selected from the bag, what is the probability (in percentage) of picking 2 red marbles? Give your answer to one decimal place.

As there are a total of 10 marbles in the bag, then the probability of picking a red marble is 5/10. When the next marble is selected, there are only 9 marbles left in the bag since the red marble has not be...
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Answered by Peter B. • Maths tutor
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How do different factors affect the rate of photosynthesis and transpiration in plants?

Firstly it's important to distinguish that photosynthesis and transpiration are two different processes. Photosynthesis is the process used by plants to convert carbon dioxide and water into gucose and oxyge...
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Answered by Emma S. • Biology tutor
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